llvm-mirror/test/CodeGen/SystemZ/fp-abs-01.ll

; Test floating-point absolute.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

; Test f32.
declare float @llvm.fabs.f32(float %f)
define float @f1(float %f) {
; CHECK: f1:
; CHECK: lpebr %f0, %f0
; CHECK: br %r14
  %res = call float @llvm.fabs.f32(float %f)
  ret float %res
}

; Test f64.
declare double @llvm.fabs.f64(double %f)
define double @f2(double %f) {
; CHECK: f2:
; CHECK: lpdbr %f0, %f0
; CHECK: br %r14
  %res = call double @llvm.fabs.f64(double %f)
  ret double %res
}

; Test f128.  With the loads and stores, a pure absolute would probably
; be better implemented using an NI on the upper byte.  Do some extra
; processing so that using FPRs is unequivocally better.
declare fp128 @llvm.fabs.f128(fp128 %f)
define void @f3(fp128 *%ptr, fp128 *%ptr2) {
; CHECK: f3:
; CHECK: lpxbr
; CHECK: dxbr
; CHECK: br %r14
  %orig = load fp128 *%ptr
  %abs = call fp128 @llvm.fabs.f128(fp128 %orig)
  %op2 = load fp128 *%ptr2
  %res = fdiv fp128 %abs, %op2
  store fp128 %res, fp128 *%ptr
  ret void
}